If you’re experiencing some unwelcome visitors in your yard or garden, you can use information found in our library collection to help you identify and eradicate pests. This article will help you find resources by plant type or pest type. Titles that do not have links can be checked out in hard copy from our library. As always, you can search for more resources in our library catalog.
General Resources
Beneficial Insects and Other Arthropods. Colorado State University Cooperative Extension, 2003.
Biocontrol. Colorado Department of Agriculture, 2009- . See also Biocontrol Webpage.
Buying and Selling Pesticides Online. Colorado State University, Colorado Environmental Pesticide Education Program, 2006.
Colorado Pesticide Guide. Vegetable Crops. Colorado State University Cooperative Extension, 1997.
Cooperative Agricultural Pest Survey (CAPS) Annual Report, Colorado Department of Agriculture, 2005-
Economic Considerations of Pest Management BMPs, Colorado Department of Agriculture, 1997.
Friendly Pesticides for Home Gardens. Colorado State University Cooperative Extension, 2006.
High Plains Pest Management Guide for Colorado-Western Nebraska-Wyoming. Cooperative Extension Services of Colorado State University, University of Wyoming, and University of Nebraska, 1998.
Homeowner’s Guide, Alternative Pest Management for the Lawn and Garden. Colorado State University Cooperative Extension, 2002.
Homeowner’s Guide to Pesticide Use Around the Home and Garden. Colorado State University Cooperative Extension, 2002.
Household Insects of the Rocky Mountain States. Colorado State University Cooperative Extension Service, University of Wyoming Extension, and Montana State University Extension, 1994.
Insect Control: Horticultural Oils. Colorado State University Cooperative Extension, 2005.
Insect Pest Control in Colorado Organic Vegetable Gardens. Colorado State University Cooperative Extension, 1994.
Insect Pests of Landscape Plants. Colorado State University Cooperative Extension Service, 1970.
Integrated Pest Management Practices in Colorado. Colorado State University Department of Bioagricultural Service and Pest Management, 1997.
Landscape Insect and Mite Pest Management Guide, Colorado State University Cooperative Extension, 1988.
Outdoor Vertebrate Pest Control. Colorado Department of Agriculture, 2008.
Preventing Plant Diseases in the Vegetable Garden. Colorado State University Extension Service, 1979.
Residential/Commercial Pest Control. Colorado Department of Agriculture, 2006.
Safe Pesticide Handling. Colorado State University, High Plains Intermountain Center for Agricultural Health and Safety, 1998.
Vegetable Crop Pests. Colorado State College Extension Service, Farm Victory Program, 1943.
Vegetable Garden Hints. Colorado Master Gardener Program, Colorado State University Cooperative Extension, 2003.
Weed and Insect Impacts in Colorado and the Costs and Impacts of Biocontrol. Colorado Department of Agriculture, 2001.
By Plant Type
Alfalfa
Alfalfa: Weeds, Diseases, Insects. Colorado State University Cooperative Extension, 1999.
Alfalfa Weevil. Colorado State University Cooperative Extension, 2011.
The Alfalfa Weevil in Colorado. Colorado Agricultural College, Colorado Experiment Station, 1933.
Aphids in Alfalfa. Colorado State University Extension, 2011.
Management of the Alfalfa Leaf-Cutter Bee in Colorado. Colorado State University Experiment Station, 1972.
Survival of Several Alfalfa Varieties Seeded on Irrigated Land Infested with Bacterial Wilt. Colorado State College Experiment Station, 1938.
Beans
Dry Bean Production & Pest Management. Colorado State University Cooperative Extension, 2015.
Western Bean Cutworm: Characteristics and Management in Corn and Dry Beans. Colorado State University Extension, 2008.
Berries
Currants, Gooseberries, and Jostaberries for the Home Garden. Colorado State University Cooperative Extension, 1993.
Raspberries for the Home Garden. Colorado State University Extension, 2010.
Strawberries for the Home Garden. Colorado State University Extension, 2009.
Corn
Ecology and Control of Spider Mites on Corn in Northeastern Colorado. Colorado State University Cooperative Extension Service, 1983.
European Corn Borers. Colorado State University Cooperative Extension, 1986.
Management of European Corn Borer with Bt Corn Hybrids in Eastern Colorado. Colorado State University Agricultural Experiment Station, 1999.
Management of Spider Mites in Corn. Colorado State University Cooperative Extension, 1986.
Managing Corn Pests with Bt Corn. Colorado State University Cooperative Extension, 2010.
Spider Mites in Corn. Colorado State University Extension, 2010.
Sweet Corn for the Garden. Colorado State University Extension Service, 2003.
Sweet Corn Insect Control. Colorado State University Cooperative Extension, 1986.
Western Bean Cutworm: Characteristics and Management in Corn and Dry Beans. Colorado State University Extension, 2008.
Western Corn Rootworm. Colorado State University Extension, 2010.
Cucumbers
Cucumbers, Pumpkins, Squash, and Melons. Colorado State University Extension, 2010.
Eggplant
Peppers and Eggplant. Colorado State University Cooperative Extension, 2007.
Flowers
Insect Control in the Flower Garden. Colorado State University Extension Service, 1982.
Tobacco (Geranium) Budworm. Colorado State University Cooperative Extension, 2003.
Grapes
Colorado Grape Growers’ Guide. Colorado State University Cooperative Extension, 1998. Includes chapter on vineyard pest management/control.
Insect and Mite Pests Associated with West Slope Wine Grapes. Colorado State University Agricultural Experiment Station, 1994.
Greenhouse/houseplants
Fungus Gnats and as Houseplant and Indoor Pests. Colorado State University Cooperative Extension, 2009.
Greenhouse Whitefly. Colorado State University Cooperative Extension, 2007.
Household Insect Pests: Characteristics and Control. Colorado State University Cooperative Extension Service, 1981.
Household Insects of the Rocky Mountain States. Colorado State University Cooperative Extension Service, University of Wyoming Extension, and Montana State University Extension, 1994.
Household Pest Control: Pesticide Application and Safety Training Guide. Colorado Department of Agriculture, 1981.
Household Pesticides. Colorado State University, Colorado Environmental Pesticide Education Program, 2006.
Insect Control: Soaps and Detergents. Colorado State University Extension, 2008.
Interior Plant Pest Control. Colorado Department of Agriculture, 2006.
Managing Houseplant Pests. Colorado State University Cooperative Extension, 2006.
Lawns
Clover and Other Mites of Turfgrass. Colorado State University Cooperative Extension, 2007.
Insect Management Recommendations for Turf and Ornamentals. Colorado State University Cooperative Extension Service, 2004.
Leafhoppers on Lawns. Colorado State University Extension, 2008.
Sod Webworms and Cutworms in Lawns. Colorado State University Cooperative Extension, 1989.
Turf Insects: Pesticide Application and Safety Training Guide. Colorado Department of Agriculture, 1981.
Turf Pest Control. Colorado Department of Agriculture, 2015.
Turfgrass Insects in Colorado & Northern New Mexico. Colorado State University Cooperative Extension, 1996.
Leafy Greens
Leafy Vegetable Crops for the Home Garden. Colorado State University Cooperative Extension, 1989.
Melons
Cucumbers, Pumpkins, Squash, and Melons. Colorado State University Extension, 2010.
Onions
Colorado Insecticide Trials for Control of Thrips on Onions, 1995-2006. Colorado State University Agricultural Experiment Station, 2006.
Colorado Onion Production and Integrated Pest Management, Colorado State University Cooperative Extension, 1995.
Onion Thrips: Characteristics and Control. Colorado State University Cooperative Extension, 1994.
Onions and Related Species for the Home Garden. Colorado State University Cooperative Extension, 1991.
Peas
A Bacterial Stem Blight of Field and Garden Peas. Colorado Agricultural College, Colorado Experiment Station, 1916.
Peppers
Peppers and Eggplant. Colorado State University Cooperative Extension, 2007.
Potatoes
Best Management Practices for Integrated Pest Management in the San Luis Valley: Potato. Colorado State University Cooperative Extension, 1996.
Colorado Potato Pests. Colorado State College, Colorado Experiment Station, 1941.
Controlling Colorado Potato Pests. Colorado State College, Colorado Experiment Station, 1937.
Potato Flea-Beetle Control. Colorado Agricultural College, Colorado Experiment Station, 1933.
Potato or Tomato Psyllids. Colorado State University Cooperative Extension, 2007.
Potatoes for the Home Garden. Colorado State University Cooperative Extension, 2003.
Psyllid Control on Potatoes and Tomatoes in the Victory Garden. Colorado State College, Colorado Experiment Station, 1943.
The Tomato Psyllid and the Control of Psyllid Yellows of Potatoes. Colorado Agricultural College, Colorado Experiment Station, 1934.
Pumpkins and Squash
Cucumbers, Pumpkins, Squash, Muskmelons, and Watermelons for the Home Garden. Colorado State University Cooperative Extension, 1994.
Squash Bugs: Management in Home Gardens. Colorado State University Cooperative Extension, 2008.
Trees and Shrubs
Aphids on Shade Trees and Ornamentals. Colorado State University Cooperative Extension, 2004.
Boxelder Bugs. Colorado State University Extension, 2008.
Conifer Seed Bugs. Colorado State University Cooperative Extension, 2006.
Control of Some Scale Insects Infesting Colorado Trees and Shrubs. Colorado Agricultural College, Office of the State Entomologist, 1924.
Douglas-Fir Tussock Moths. Colorado State University Extension, 2009.
Elm Leaf Beetles. Colorado State University Cooperative Extension, 2006.
Emerald Ash Borer. Colorado State Forest Service, 2011.
Insect and Mite Pests of Honeylocust. Colorado State University Cooperative Extension, 2006.
Insects and Diseases of Woody Plants in Colorado. Colorado State University Extension, 2014.
Insects and Diseases of Woody Plants of the Central Rockies. Colorado State University Cooperative Extension, 2000.
Insects that Feed on Colorado Trees and Shrubs. Colorado State University Cooperative Extension Service, 1993.
Leafmining Insects. Colorado State University Extension, 2009.
Management Recommendations for Insect Pests of Trees and Shrubs. Colorado State University Cooperative Extension, 1995.
Oystershell Scale. Colorado State University Extension, 2008.
Pine Needle Scale. Colorado State University Cooperative Extension Service, 1986
Pinyon Pine Diseases and Insects. Colorado State University Extension, 2009.
Scale Insects Affecting Conifers. Colorado State University Cooperative Extension, 2006.
Spruce Bark Beetle. Colorado State Forest Service, 2002.
What’s Ailing Your Aspen? Common Insects and Diseases of Aspen. Colorado State Forest Service, 2004.
White Pine Weevil. Colorado State University Extension, 2008.
Zimmerman Pine Moth. Colorado State University Extension, 2008.
Fruit Trees
Apple and Pear Insects. Colorado State University Cooperative Extension, 2007.
A Cherry Pest in Colorado. Colorado Agricultural College Experiment Station, 1932.
Colorado Tree Fruits Pest and Crop Management Guide. Colorado State University Cooperative Extension, 1997; 1999 update.
Stone Fruit Insects. Colorado State University Cooperative Extension, 2005.
Tomatoes
Potato and Tomato Psyllids. Colorado State University Cooperative Extension, 2007.
Psyllid Control on Potatoes and Tomatoes in the Victory Garden. Colorado State College, Colorado Experiment Station, 1943.
Recognizing Tomato Problems. Colorado State University Extension, 2009.
The Tomato Psyllid and the Control of Psyllid Yellows of Potatoes. Colorado Agricultural College, Colorado Experiment Station, 1934.
Tomatoes for the Home Garden. Colorado State University Cooperative Extension, 1994.
Wheat
Mites in Wheat. Colorado State University Extension, 2010.
Wheat Production and Pest Management for the Great Plains Region. Colorado State University Extension, 2010.
Wheat Stem Sawfly: A New Pest of Colorado Wheat. Colorado State University Extension, 2011.
By Pest Type
Aphids
Alternate Host Plants of Russian Wheat Aphid in Colorado. Colorado State University Agricultural Experiment Station, 1997.
Aphids in Alfalfa. Colorado State University Extension, 2011.
Aphids on Shade Trees and Ornamentals. Colorado State University Cooperative Extension, 2004.
Estimating the Correlation Between Fall and Spring Population Densities of the Russian Wheat Aphid. Colorado State University Department of Bioagricultural Sciences and Pest Management, 2010.
Estimating Russian Wheat Aphid (Homoptera: aphididae) Overwintering Success Using Weather Data. Colorado State University Department of Bioagricultural Sciences and Pest Management, 2010.
Honeysuckle Witches’ Broom Aphid. Colorado State University Cooperative Extension, 2003.
Occurrence of Russian Wheat Aphid (Homoptera: aphididae) on Non-Cultivated Grasses Within Colorado Montane Environments. Colorado State University Agricultural Experiment Station, 2011.
Bacillus Thuringiensis
Bacillus Thuringiensis. Colorado State University Extension, 2008.
Bees and Wasps
European Paper Wasp. Colorado State University Extension, 2008.
Leafcutter Bees. Colorado State University Cooperative Extension, 2006.
Management of the Alfalfa Leaf-Cutter Bee in Colorado. Colorado State University Experiment Station, 1972.
Nuisance Wasps and Bees. Colorado State University Cooperative Extension, 2007.
Pigeon Tremex Horntail and the Giant Ichneumon Wasp. Colorado State University Cooperative Extension, 2007.
Beetles
An Annotated Bibliography of Thousand Cankers Disease, Including…Information on the Walnut Twig Beetle… Colorado State University Agricultural Experiment Station, 2015.
Blister Beetles in Forage Crops. Colorado State University Extension, 2010.
Cereal Leaf Beetle: Identification, Biology, and Management. Colorado State University Cooperative Extension, 2006.
Elm Leaf Beetles. Colorado State University Cooperative Extension, 2006.
Flea Beetles. Colorado State University Cooperative Extension, 2006.
Japanese Beetle. Colorado State University Cooperative Extension, 2007.
Lady Beetles. Colorado State University Cooperative Extension, 2006.
Spruce Bark Beetle. Colorado State Forest Service, 2002.
Caterpillars, Larvae, and Segmented Worms
Armyworms. Colorado State University Extension, 2010.
Caterpillars in Small Grains. Colorado State University Extension, 2010.
Field Key for Identification of Caterpillars Found on Field and Vegetable Crops in Colorado. Colorado State University Cooperative Extension, 1990.
Methods of Combatting Four Field Crop Pests in Colorado: Beet Webworm, Alfalfa Webworm, Army Cutworm, Pale Western Cutworm. Colorado
Agricultural College, Colorado Extension Service, 1921.
Sod Webworms and Cutworms. Colorado State University Cooperative Extension, 2003.
Tent-Making Caterpillars. Colorado State University Cooperative Extension, 2006.
Tobacco (Geranium) Budworm. Colorado State University Cooperative Extension, 2003.
Western Bean Cutworm: Characteristics and Management in Corn and Dry Beans. Colorado State University Extension, 2008.
Western Corn Rootworm. Colorado State University Extension, 2010.
Flies
Greenhouse Whitefly. Colorado State University Cooperative Extension, 2007.
Wheat Stem Sawfly: A New Pest of Colorado Wheat. Colorado State University Extension, 2011.
Gnats
Fungus Gnats and as Houseplant and Indoor Pests. Colorado State University Cooperative Extension, 2009.
Grasshoppers
Grasshopper Control in Gardens and Small Acreages. Colorado State University Cooperative Extension, 2008.
Leafhoppers on Lawns. Colorado State University Extension, 2008.
Grubs
Billbugs and White Grubs. Colorado State University Cooperative Extension, 2005.
Ladybugs
Lady Beetles. Colorado State University Cooperative Extension, 2006.
Mantids
Mantids of Colorado. Colorado State University Cooperative Extension, 2007.
Mites
Clover and Other Mites of Turfgrass. Colorado State University Cooperative Extension, 2007.
Ecology and Control of Spider Mites on Corn in Northeastern Colorado. Colorado State University Cooperative Extension Service, 1983.
Landscape Insect and Mite Pest Management Guide, Colorado State University Cooperative Extension, 1988.
Management of Spider Mites in Corn. Colorado State University Cooperative Extension, 1986.
Mites in Wheat. Colorado State University Extension, 2010.
Spider Mites. Colorado State University Cooperative Extension, 2006.
Spider Mites in Corn. Colorado State University Extension, 2010.
Moths
Douglas-Fir Tussock Moths. Colorado State University Extension, 2009.
Hornworms and “Hummingbird Moths.” Colorado State University Cooperative Extension, 2007.
Indian Meal Moth. Colorado State University Extension, 2008.
Miller Moths. Colorado State University Cooperative Extension, 2006.
Pine Tip Moths. Colorado State University Extension, 2008.
Snailcase Bagworm. Colorado State University Cooperative Extension, 2007. (It’s neither a snail nor a worm. It’s actually a moth).
Zimmerman Pine Moth. Colorado State University Extension, 2008.
Nematodes (unsegmented worms)
Importance of Plant Parasitic Nematodes in Colorado Crops. Colorado State University Extension, 2011.
Insect Control with Insect Parasitic Nematodes. Colorado State University Cooperative Extension, 1994.
Insect Parasitic Nematodes. Colorado State University Extension, 2008.
Weird Worms: Horsehair Worm and the Grasshopper Nematode. Colorado State University Extension, 2008.
Psyllids
An Annotated Bibliography of the Potato/Tomato Psyllid. Colorado State University Agricultural Experiment Station, 1993.
Potato or Tomato Psyllids. Colorado State University Cooperative Extension, 2007.
Psyllid Control on Potatoes and Tomatoes in the Victory Garden. Colorado State College, Colorado Experiment Station, 1943.
The Tomato Psyllid and the Control of Psyllid Yellows of Potatoes. Colorado Agricultural College, Colorado Experiment Station, 1934.
Scales
Control of Some Scale Insects Infesting Colorado Trees and Shrubs. Colorado Agricultural College, Office of the State Entomologist, 1924.
Oystershell Scale. Colorado State University Extension, 2008.
Pine Needle Scale. Colorado State University Cooperative Extension Service, 1986.
Scale Insects Affecting Conifers. Colorado State University Cooperative Extension, 2006.
Slugs
Attractiveness of Beer and Fermentation Products to the Gray Garden Slug. Colorado State University Agricultural Experiment Station, 1997.
Pear Slugs. Colorado State University Cooperative Extension, 2004.
Slugs. Colorado State University Extension, 2008.
Squash Bugs
Squash Bugs: Management in Home Gardens. Colorado State University Cooperative Extension, 2008.
Thrips
Colorado Insecticide Trials for Control of Thrips on Onions, 1995-2006. Colorado State University Agricultural Experiment Station, 2006.
The Gladiolus Thrips in Colorado. Colorado State College, Office of the State Entomologist, 1935.
Onion Thrips: Characteristics and Control. Colorado State University Cooperative Extension, 1994.
Weevils
Alfalfa Weevil. Colorado State University Cooperative Extension, 2011.
The Alfalfa Weevil in Colorado. Colorado Agricultural College, Colorado Experiment Station, 1933.
Root Weevils. Colorado State University Extension Service, 2006.
Sunflower Stem Weevil Management. Colorado State University Extension, 2010.
White Pine Weevil. Colorado State University Extension, 2008.
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